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Jquery_AjaxFileUpload插件的使用记录

时间:2015-12-10 13:01:23      阅读:187      评论:0      收藏:0      [点我收藏+]

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功能需求:Spring MVC框架下,实现无刷新页面上传图片,并展示图片预览效果

直接上代码:

1.图片预览效果

<%@ page contentType="text/html;charset=UTF-8"%>
<html> 
    <head> 
        <title>本地图片上传预览</title> 
        <script> 
            function PreviewImage(imgFile) 
            { 
                var pattern = /(\.*.jpg$)|(\.*.png$)|(\.*.jpeg$)|(\.*.gif$)|(\.*.bmp$)/;      
                if(!pattern.test(imgFile.value)) 
                { 
                    alert("系统仅支持jpg/jpeg/png/gif/bmp格式的照片!");  
                    imgFile.focus(); 
                } 
                else 
                { 
                    var path; 
                    if(document.all)//IE 
                    { 
                        imgFile.select(); 
                        path = document.selection.createRange().text; 
                        document.getElementById("imgPreview").innerHTML=""; 
                        document.getElementById("imgPreview").style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(enabled=‘true‘,sizingMethod=‘scale‘,src=\"" + path + "\")";//使用滤镜效果 
                    } 
                    else//FF 
                    { 
                        path = URL.createObjectURL(imgFile.files[0]);
                        document.getElementById("imgPreview").innerHTML = "<img src=‘"+path+"‘/>"; 
                    } 
                } 
            } 
        </script> 
    </head> 
    <body> 
        <center>
            <input type="file" onchange=‘PreviewImage(this)‘ /> 
            <div id="imgPreview" style=‘width:500px; height:400px;‘> 
                <img src=""/> 
            </div> 
        </center>
    </body> 
</html> 

2.spring配置文件添加支持文件上传

<!-- 支持上传文件 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>

3.调用ajaxFileUpload插件

/**
         * 企业用户注册
         * @param registerObj
         * @param RegisterJs
         */
        companyRegister: function (registerObj, RegisterJs) {
            var phone = registerObj.phone; // 手机号
            var password = registerObj.password; // 密码
            var email = registerObj.email; // 邮箱(登录用户名)
            var company = registerObj.company; // 公司名称
            var companyAddress = registerObj.companyAddress; // 公司详细地址
            var companyEmail = registerObj.companyEmail; // 企业邮箱
            var companyPhone = registerObj.companyPhone; // 企业电话
            var companyWebsite = registerObj.companyWebsite; // 公司网址
            var userType = registerObj.userType; // 0:个人 1:企业
            $.ajaxFileUpload({
                url: ctx + ‘/Register/companyRegister.action‘, //用于文件上传的服务器端请求地址
                data: {
                    phone: phone,
                    password: password,
                    email: email,
                    company: company,
                    companyAddress: companyAddress,
                    companyEmail: companyEmail,
                    companyPhone: companyPhone,
                    companyWebsite: companyWebsite,
                    userType: userType
                },
                secureuri: false, //是否需要安全协议,一般设置为false
                fileElementId: ‘licenseImg‘, //文件上传域的ID
                dataType: ‘json‘, //返回值类型 一般设置为json
                success: function (data, status) {  //服务器成功响应处理函数
                    if (data) {
                        var status = data.status;
                        var errorMsg = data.errorMsg;
                        if (status == 1) {
                            RegisterJs.changeStep(3);
                        } else {
                            showMessage(errorMsg);
                        }
                    } else {
                        showMessage("系统异常,请联系管理员!");
                    }
                },
                error: function (data, status, e) {//服务器响应失败处理函数
                    showMessage(e);
                }
            });
        }

4.修改ajaxFileUpload.js文件中Json处理代码

uploadHttpData: function (r, type) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;

        // If the type is "script", eval it in global context
        if (type == "script")
            jQuery.globalEval(data);
        // Get the JavaScript object, if JSON is used.
        if (type == "json")
            data = r.responseText;
            var start = data.indexOf(">");
            if (start != -1) {
                var end = data.indexOf("<", start + 1);
                if (end != -1) {
                    data = data.substring(start + 1, end);
                }
            }
            eval("data = " + data);
        // evaluate scripts within html
        if (type == "html")
            jQuery("<div>").html(data).evalScripts();

        return data;
    }

*关键部分:

if (type == "json")
            data = r.responseText;
            var start = data.indexOf(">");
            if (start != -1) {
                var end = data.indexOf("<", start + 1);
                if (end != -1) {
                    data = data.substring(start + 1, end);
                }
            }
            eval("data = " + data);

 

ajaxFileUpload.js全部源码:

jQuery.extend({
    createUploadIframe: function (id, uri) {
        //create frame
        var frameId = ‘jUploadFrame‘ + id;
        var iframeHtml = ‘<iframe id="‘ + frameId + ‘" name="‘ + frameId + ‘" style="position:absolute; top:-9999px; left:-9999px"‘;
        if (window.ActiveXObject) {
            if (typeof uri == ‘boolean‘) {
                iframeHtml += ‘ src="‘ + ‘javascript:false‘ + ‘"‘;

            }
            else if (typeof uri == ‘string‘) {
                iframeHtml += ‘ src="‘ + uri + ‘"‘;

            }
        }
        iframeHtml += ‘ />‘;
        jQuery(iframeHtml).appendTo(document.body);

        return jQuery(‘#‘ + frameId).get(0);
    },
    createUploadForm: function (id, fileElementId, data, fileElement) {
        //create form
        var formId = ‘jUploadForm‘ + id;
        var fileId = ‘jUploadFile‘ + id;
        var form = jQuery(‘<form  action="" method="POST" name="‘ + formId + ‘" id="‘ + formId + ‘" enctype="multipart/form-data"></form>‘);
        if (data) {
            for (var i in data) {
                jQuery(‘<input type="hidden" name="‘ + i + ‘" value="‘ + data[i] + ‘" />‘).appendTo(form);
            }
        }
        var oldElement;
        if (fileElement == null)
            oldElement = jQuery(‘#‘ + fileElementId);
        else
            oldElement = fileElement;

        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr(‘id‘, fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);

        //set attributes
        jQuery(form).css(‘position‘, ‘absolute‘);
        jQuery(form).css(‘top‘, ‘-1200px‘);
        jQuery(form).css(‘left‘, ‘-1200px‘);
        jQuery(form).appendTo(‘body‘);
        return form;
    },

    ajaxFileUpload: function (s) {
        // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout        
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()
        var form = jQuery.createUploadForm(id, s.fileElementId, (typeof(s.data) == ‘undefined‘ ? false : s.data), s.fileElement);
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = ‘jUploadFrame‘ + id;
        var formId = ‘jUploadForm‘ + id;
        // Watch for a new set of requests
        if (s.global && !jQuery.active++) {
            jQuery.event.trigger("ajaxStart");
        }
        var requestDone = false;
        // Create the request object
        var xml = {}
        if (s.global)
            jQuery.event.trigger("ajaxSend", [xml, s]);
        // Wait for a response to come back
        var uploadCallback = function (isTimeout) {
            var io = document.getElementById(frameId);
            try {
                if (io.contentWindow) {
                    xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
                    xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;

                } else if (io.contentDocument) {
                    xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
                    xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
                }
            } catch (e) {
                jQuery.handleError(s, xml, null, e);
            }
            if (xml || isTimeout == "timeout") {
                requestDone = true;
                var status;
                try {
                    status = isTimeout != "timeout" ? "success" : "error";
                    // Make sure that the request was successful or notmodified
                    if (status != "error") {
                        // process the data (runs the xml through httpData regardless of callback)
                        var data = jQuery.uploadHttpData(xml, s.dataType);
                        // If a local callback was specified, fire it and pass it the data
                        if (s.success)
                            s.success(data, status);

                        // Fire the global callback
                        if (s.global)
                            jQuery.event.trigger("ajaxSuccess", [xml, s]);
                    } else
                        jQuery.handleError(s, xml, status);
                } catch (e) {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // The request was completed
                if (s.global)
                    jQuery.event.trigger("ajaxComplete", [xml, s]);

                // Handle the global AJAX counter
                if (s.global && !--jQuery.active)
                    jQuery.event.trigger("ajaxStop");

                // Process result
                if (s.complete)
                    s.complete(xml, status);

                jQuery(io).unbind()

                setTimeout(function () {
                    try {
                        jQuery(io).remove();
                        jQuery(form).remove();

                    } catch (e) {
                        jQuery.handleError(s, xml, null, e);
                    }

                }, 100)

                xml = null

            }
        }
        // Timeout checker
        if (s.timeout > 0) {
            setTimeout(function () {
                // Check to see if the request is still happening
                if (!requestDone) uploadCallback("timeout");
            }, s.timeout);
        }
        try {

            var form = jQuery(‘#‘ + formId);
            jQuery(form).attr(‘action‘, s.url);
            jQuery(form).attr(‘method‘, ‘POST‘);
            jQuery(form).attr(‘target‘, frameId);
            if (form.encoding) {
                jQuery(form).attr(‘encoding‘, ‘multipart/form-data‘);
            }
            else {
                jQuery(form).attr(‘enctype‘, ‘multipart/form-data‘);
            }
            jQuery(form).submit();

        } catch (e) {
            jQuery.handleError(s, xml, null, e);
        }

        jQuery(‘#‘ + frameId).load(uploadCallback);
        return {
            abort: function () {
                try {
                    jQuery(‘#‘ + frameId).remove();
                    jQuery(form).remove();
                }
                catch (e) {
                }
            }
        };
    },

    uploadHttpData: function (r, type) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;

        // If the type is "script", eval it in global context
        if (type == "script")
            jQuery.globalEval(data);
        // Get the JavaScript object, if JSON is used.
        if (type == "json")
            data = r.responseText;
            var start = data.indexOf(">");
            if (start != -1) {
                var end = data.indexOf("<", start + 1);
                if (end != -1) {
                    data = data.substring(start + 1, end);
                }
            }
            eval("data = " + data);
        // evaluate scripts within html
        if (type == "html")
            jQuery("<div>").html(data).evalScripts();

        return data;
    },

    handleError: function (s, xml, status, e) {
        // If a local callback was specified, fire it
        if (s.error)
            s.error(xml, status, e);

        // Fire the global callback
        if (s.global)
            jQuery.event.trigger("ajaxError", [xml, s, e]);
    }
});

 

5.后台处理

/**
     * 企业用户注册
     *
     * @param response
     * @param user
     */
    @RequestMapping("/companyRegister")
    public void companyRegister(@RequestParam(value = "licenseImg", required = true) MultipartFile licenseImg, HttpServletResponse response, HttpServletRequest request, User user) {
        String email = user.getEmail();
        JSONObject jsonObject = new JSONObject();
        try {
            String fileName = uploadImg(request, licenseImg, user.getEmail());
            if(StringUtils.isNotEmpty(fileName)){
                user.setBusinessLicense(fileName);
            }
            userService.save(user);
            removeAuthCode(email);
            jsonObject.put("status", "1");
            jsonObject.put("errorMsg", "发送成功");
            response.getWriter().print(jsonObject);
        } catch (Exception e) {
            logger.error("企业用户注册异常【" + email + "】:", e);
        }
    }

    /**
     * 保存图片
     *
     * @param request
     * @param licenseImg
     * @param email
     * @return
     */
    public String uploadImg(HttpServletRequest request, MultipartFile licenseImg, String email) {
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
        try {
            String path = request.getSession().getServletContext().getRealPath("upload");
            String dateFolder = format.format(new Date());
            path += File.separator + dateFolder;
            String fileName = licenseImg.getOriginalFilename();
            String suffix = fileName.substring(fileName.lastIndexOf("."));
            fileName = UUID.randomUUID() + suffix;

            File targetFile = new File(path, fileName);
            if (!targetFile.exists()) {
                targetFile.mkdirs();
            }
            //保存图片
            licenseImg.transferTo(targetFile);
            return "/" + dateFolder + "/" + fileName;
        } catch (Exception e) {
            logger.error("上传营业执照异常【" + email + "】:", e);
        }
        return null;
    }

 

Jquery_AjaxFileUpload插件的使用记录

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原文地址:http://www.cnblogs.com/gisblogs/p/5035483.html

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